Section-liner.



B. SILVERSTON.

SECTION LINER.

APPLIoA'rIoN FILED 11:13.26, 1913.

1,081,161 Patented Dec.9, 1913.

BVM

W MTUHNEYS coLuMm PLANOCRAPH CQ..WASHING1DN. D. C.

WTNESSEQ BERNARD SILVER/STCE, OF NEW TIGRE, N. Y.,

SECTION-LINER.

noemer.

Specification of Letters Patent.

Patented Dec.. 9, 1913.

Application filed February 2G, 1913. Serial No. 750,803.

ing any desired spacing1 between the said parallel lines.

An object of the invention is to provide an inexpensive, simple, durable and accurate section liner by means of which a great variety of parallel lines of different spacings can be drawn.

Another object of the invention is to provide a section liner which will require no` adjustment 1n changing from one spacing of parallel lines to another.

A still further object of the invention is to provide a section liner that will have different spacing between the lines permanently fixed so that when the same spacing is ,i

used at different times the results will be;

identical.

In modern drawing practice it is often required for purposes of distinguishing the different materials or substances, to use parallel lines, either horizontal, vertical or inclined; and also in letterheads or scale drawing it is positively necessary to have parallel lines, vertical and horizontal, on exact spacino. lt is understood that according to the scale the spacing must vary, and therefore a great variety of spacing is required in practice. Many attempts have been made to produce an inexpensive and simple device for this purpose, but so far they are either limited to one particular spacing and are only useful for sections indicating the substance and can only be used in a certain direction, or they are so uncertain in their action and so limited that they have never been adapted in the drawing room. There are devices which are very expensive and consequently not available to every draftsman, and for every operation requiring a skilled and trained draftsman to adjust them for dilferent spaces, and for every change they require adjustment and are therefore very delicate. To obviate all this I have invented an inexpensive section liner which can be operated by a novice for a great variety of spaces, and not requiring any adjustment while changing from one spacing' to another.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresjionding` parts in both views, and in which- Figure l is a pla-n view of an embodiment of my invention in operation; and Fig. 2 is a perspective view of the device showing the parts separated.

Before proceeding to a more detailed description of mv device it must be understood that while the drawings disclose two triangles forming the device, one may be a rectangle or any other polygon if desired, and

l the notches may be provided on one or more sides. The ends of the triangles having the notches may be made of metal with the rest of it of any other material, generally vulcanized rubber, or the entire triangle may be of metal or any other material. The notches are preferably rectangular, but may be of any other form.

Referring to the drawings, 10 is a 450 right angle triangle, having one leg provided with a plurality of notches ll, the notches being rectangular in form. and near the intersection of the leg with the hypotenuse is preferably a small notch and every following notch increasing in size. The purpose of this will appear later. nother right angle triangle l2, preferably (SO-30, has a rectangular projection 18 provided at the vertex of the right angle, and having one of its sides as a continuation of the larger leg1 of the triangle l2. The projection 13 has a predetermined width so that when fitting in any of the notches 1l. a certain predetermined play 14s between one side of the projection and the sides of the notch is formed. As the projection is constant and the notches are different in size, a different play exists between every notch and the projection, and` consequently` a different spacing of parallel lines will be obtained, as will appear from the explanation of the operation of my line sect-inner.

The hypotenuse of the right angle triangle 10 is placed in the direction and at the place at which the lines are to be drawn, and then the right angle triangle l2 is applied so that the rectangular projection 13 will enter the notch having the desired spacing, and the short leg of said triangle will bear against the side with the notches on the triangle 10. It may be remarked here that every notch may carry a number indicating the spacing between the lines that each will obtain, or the size of the scale. At the start the lower side of the projection 13 of the triangle 12 will bear against the lower side of the rectangular notch, and then the first line is drawn. After the rst line is drawn the triangle 10 is slid so that the leg with the notches is constantly in bearing with the short leg of the triangle 12, until the upper side of the notch comes in bearing with the upper side of the projection 18 of the triangle 12, as shown in Fig. 1. Then again draw a line which will be parallel and have the spacing equal to the play between the particular notch and the projection 13. After this line is drawn the triangle 12 is slid so as to be constantly in bearing with the larger leg and the notched leg of the triangle 10, until the lower edge of the projection 13 is stopped by the lower side of the rectangular notch in the triangle 10. Then while the triangle 12 is held in place, triangle 10 is moved in the same way as before stated, and another parallel line can be drawn; and so forth. It is understood that while one triangle is moved the other is kept in place.

From the above it can be easily seen that sets of parallel lines can be drawn having any desired angle between them as practice will require, and having the same or different spacing. It may also be remarked that parallel lines having different spacing may be drawn one after another, by simply displacing the triangle 12 from one notch to another and keeping the triangle 10 in place while the change is being made.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is z- 1. A device of the class described comprising a member having a series of notches of different predetermined widths, and a triangle having a projection adapted to operate in any of the said notches.

2. A device of the class described comprising a triangle having notches in one side, said notches being of different sizes, another triangle having a projection at its vertex and normal to one of its sides and adapted to engage the side of any desired notch, the side normal to the projection bearing against the side of the first named triangle having the notches when said projection operates in one of said notches.

3. In combination, a 45 right triangle having rectangular notches of different sizes in one of its sides, and a (iO-3()O right triangle having a rectangular' projection of a predetermined width and at the vertex of the right angle and normal to the shorter leg, adapted to engage the sides of any of the said notches in said L50 right triangle, whereby sets of parallel lines of same or different spacing Inay be drawn.

In testimony .whereof l have signed my name to this specification in the presence of two subscribing witnesses.

BERNARD SILVERSTON.,

Witnesses:

DANIEL C. RUDDIN, GEORGE KELINE.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

